Automatic alarm clock for hotels



July 1, 1930. u. GIOMI l;769,830

AUTOIATIC ALARI CLOCK FOR HOTELS Filed Oct. 5, 1927 2 Sheets-Sheet 1 \NVENTOR ULDERIC'O 610M! ATTORNEY July 1, 1930. I u, GIOMI 1,769,830

AUTOMATIC ALARM CLOCK FOR HOTELS Filed 001:. 5, 1927 2 Shoots-Sheet 2 INVENTOR ULDER/Cfl 610M! ATTORNEY Patented July 1, 1930 UNITED STATES ULDERICO GIOMI, OI GROS SET O, ITALY AUTOMATIC ALARM. crock FOR Romans Application filed October 5, 1927, Serial No. 224,256, and in Italy August 27, 1927.

The object of my present invention is to electric lamp beinglighted at the same time in his sight The said central clock closes every hour 10 and half hour a circuit to the alarm bells and lamps of the particular room orrooms for which a plug has been inserted in the central clock at a particular hour or half hour.

Three minutes after the ringing of the bell 15 and lighting of lamp these are automatically repeated a second time.

One of many forms of realization of my invention is illustrated by way of example in the annexed drawings in which Fig. 1 is a diagrammatical elevation view of central clock and switch board,

Fig. 2 front view of dial,

F Fig. 3 a central section on line a-a of Fig. 4 a section on line b-b of Fig. 3 and Fig. 5 a circuit diagram.

In the said figures 1 is the collector ring to which one of the ends 2 of the secondary of converter 3 is electrically connected. The so said ring 1 surrounds the rotatable terminal of the hour switches 5 individually connected to hour plates 6 of switch board 7, the transverse plates being for the hours, and the vertical plates for the half hours.

The said plates 6 have sockets 4 into which the plu s 4' of the bells 19 are to be inserted, from w ich latter return lines lead directly to the other end 8 of the secondary of converter 3 (see also Fig. 5).

With special reference to Figs. 2, 3 and 4 it will be noted that each hour switch 5 comprises a sleeve 9 and a short rod 10 terminating at the top in a head 14 and PIOXidGCl with a tooth 12 opposite two spaced projections 15 and 15 of the hour-hand 16, the said two projections being for the first and second call contact respectively.

To rod 10 a coil spring 11 is connected adapted to form electric contact with collec- 50 tor ring 1 on rotation of rod 10. a

The latter is normally kept in position 5 of Figs. 2 and 4, owing to coil spring 11 being removed a small distance d from collector ring 1 by a small spring 13, Figs. 2 and 3, fixed at one end to a screw 17 and at the other end to the tooth 12. p

I In operative position, however, when the clock hand, as isseen at 5 in Figs. 2 and 4, has angularly shifted the tooth 12by overcoming the resistance of spring 13, the coil spring 11 contacts withering 1 at18. When hand 16 has moved through the given interval it leaves tooth 12, and the switch is automatically restored to position 5' under the action of spring 13.

The switches 5, as said, are connected to plates 6 by leads 19 each plate 6 having a certain number of holes or sockets 4 for the one-wire plug 4 in which every lead 20 terminates, the said lead 20 completing the circuit with return wire 8 through bells 19 and lamps 21.

The following is an instance of operating the device.

The operator inserts plug 4' corresponding to bed-room I into one of the sockets of plate 6 which is in electric communication with the switch for 2 oclock.

At 2 oclock the projection 15 of the hourhand 16 operates tooth 12 of rod 10 to rotate thereby operating the corresponding switch 5 which by coil 11 contacts with collector ring 1.

Occupant of bed-room I is thus rung up and finds the lamp united with the bell already lighted.

The projections of the hands 16 are spaced such a distance apart, that in about three minutes after the projection 15 has passed out of engagement with the tooth 12, the projection 15 engages the tooth 12 and the ringing of the bell and the lighting of the lamp is repeated.

Plates 6 are interior, only the plug sockets or holes being visible from Without.

Furthermore the main line comprises a single wire common to all unipolar returns so that from one central position or switch board a plurality of points may be called.

It is not even necessary to use an illumination line for the device, a cell and accumulator battery being quite sufficient, thereby doing away with converter 3. Should the street current fail the device will function all the same by cells of the same voltage on the converter. Change of current from converted to direct current is effected by an automatic relay of known structure.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed I declare that what I claim is:

Automatic central alarm-clock for manyroomed establishments comprising a number of peripheral hour switches corresponding to the desired number of fractions of an hour, a common collector ring, a rotatable rod in each switch, a small spring for returning the rod to normal position, a contact coil spring for each rod capable of forming contact, on rotation of rod, with the said collector ring, a tooth on each rod periodically cooperating with the hour-hand of the clock so as to rotate the rod in opposition to the action of the small spring for closing the circuit of the corresponding bell and lamp.

In testimony whereof I have hereunto signed my name.

ULDERICO GIOMI. 

